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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#ifndef INCLUDE_git_index_h__
#define INCLUDE_git_index_h__
#include "common.h"
#include "indexer.h"
#include "types.h"
#include "oid.h"
#include "strarray.h"
/**
* @file git2/index.h
* @brief Git index parsing and manipulation routines
* @defgroup git_index Git index parsing and manipulation routines
* @ingroup Git
* @{
*/
GIT_BEGIN_DECL
/** Time structure used in a git index entry */
typedef struct {
git_time_t seconds;
/* nsec should not be stored as time_t compatible */
unsigned int nanoseconds;
} git_index_time;
/**
* In-memory representation of a file entry in the index.
*
* This is a public structure that represents a file entry in the index.
* The meaning of the fields corresponds to core Git's documentation (in
* "Documentation/technical/index-format.txt").
*
* The `flags` field consists of a number of bit fields which can be
* accessed via the first set of `GIT_IDXENTRY_...` bitmasks below. These
* flags are all read from and persisted to disk.
*
* The `flags_extended` field also has a number of bit fields which can be
* accessed via the later `GIT_IDXENTRY_...` bitmasks below. Some of
* these flags are read from and written to disk, but some are set aside
* for in-memory only reference.
*/
typedef struct git_index_entry {
git_index_time ctime;
git_index_time mtime;
unsigned int dev;
unsigned int ino;
unsigned int mode;
unsigned int uid;
unsigned int gid;
git_off_t file_size;
git_oid oid;
unsigned short flags;
unsigned short flags_extended;
char *path;
} git_index_entry;
/**
* Bitmasks for on-disk fields of `git_index_entry`'s `flags`
*
* These bitmasks match the four fields in the `git_index_entry` `flags`
* value both in memory and on disk. You can use them to interpret the
* data in the `flags`.
*/
#define GIT_IDXENTRY_NAMEMASK (0x0fff)
#define GIT_IDXENTRY_STAGEMASK (0x3000)
#define GIT_IDXENTRY_EXTENDED (0x4000)
#define GIT_IDXENTRY_VALID (0x8000)
#define GIT_IDXENTRY_STAGESHIFT 12
#define GIT_IDXENTRY_STAGE(E) (((E)->flags & GIT_IDXENTRY_STAGEMASK) >> GIT_IDXENTRY_STAGESHIFT)
/**
* Bitmasks for on-disk fields of `git_index_entry`'s `flags_extended`
*
* In memory, the `flags_extended` fields are divided into two parts: the
* fields that are read from and written to disk, and other fields that
* in-memory only and used by libgit2. Only the flags in
* `GIT_IDXENTRY_EXTENDED_FLAGS` will get saved on-disk.
*
* These bitmasks match the three fields in the `git_index_entry`
* `flags_extended` value that belong on disk. You can use them to
* interpret the data in the `flags_extended`.
*/
#define GIT_IDXENTRY_INTENT_TO_ADD (1 << 13)
#define GIT_IDXENTRY_SKIP_WORKTREE (1 << 14)
/* GIT_IDXENTRY_EXTENDED2 is reserved for future extension */
#define GIT_IDXENTRY_EXTENDED2 (1 << 15)
#define GIT_IDXENTRY_EXTENDED_FLAGS (GIT_IDXENTRY_INTENT_TO_ADD | GIT_IDXENTRY_SKIP_WORKTREE)
/**
* Bitmasks for in-memory only fields of `git_index_entry`'s `flags_extended`
*
* These bitmasks match the other fields in the `git_index_entry`
* `flags_extended` value that are only used in-memory by libgit2. You
* can use them to interpret the data in the `flags_extended`.
*/
#define GIT_IDXENTRY_UPDATE (1 << 0)
#define GIT_IDXENTRY_REMOVE (1 << 1)
#define GIT_IDXENTRY_UPTODATE (1 << 2)
#define GIT_IDXENTRY_ADDED (1 << 3)
#define GIT_IDXENTRY_HASHED (1 << 4)
#define GIT_IDXENTRY_UNHASHED (1 << 5)
#define GIT_IDXENTRY_WT_REMOVE (1 << 6) /* remove in work directory */
#define GIT_IDXENTRY_CONFLICTED (1 << 7)
#define GIT_IDXENTRY_UNPACKED (1 << 8)
#define GIT_IDXENTRY_NEW_SKIP_WORKTREE (1 << 9)
/** Capabilities of system that affect index actions. */
typedef enum {
GIT_INDEXCAP_IGNORE_CASE = 1u,
GIT_INDEXCAP_NO_FILEMODE = 2u,
GIT_INDEXCAP_NO_SYMLINKS = 4u,
GIT_INDEXCAP_FROM_OWNER = ~0u
} git_indexcap_t;
/** Callback for APIs that add/remove/update files matching pathspec */
typedef int (*git_index_matched_path_cb)(
const char *path, const char *matched_pathspec, void *payload);
/** Flags for APIs that add files matching pathspec */
typedef enum {
GIT_INDEX_ADD_DEFAULT = 0,
GIT_INDEX_ADD_FORCE = (1u << 0),
GIT_INDEX_ADD_DISABLE_PATHSPEC_MATCH = (1u << 1),
GIT_INDEX_ADD_CHECK_PATHSPEC = (1u << 2),
} git_index_add_option_t;
/**
* Match any index stage.
*
* Some index APIs take a stage to match; pass this value to match
* any entry matching the path regardless of stage.
*/
#define GIT_INDEX_STAGE_ANY -1
/** @name Index File Functions
*
* These functions work on the index file itself.
*/
/**@{*/
/**
* Create a new bare Git index object as a memory representation
* of the Git index file in 'index_path', without a repository
* to back it.
*
* Since there is no ODB or working directory behind this index,
* any Index methods which rely on these (e.g. index_add) will
* fail with the GIT_EBAREINDEX error code.
*
* If you need to access the index of an actual repository,
* use the `git_repository_index` wrapper.
*
* The index must be freed once it's no longer in use.
*
* @param out the pointer for the new index
* @param index_path the path to the index file in disk
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_open(git_index **out, const char *index_path);
/**
* Create an in-memory index object.
*
* This index object cannot be read/written to the filesystem,
* but may be used to perform in-memory index operations.
*
* The index must be freed once it's no longer in use.
*
* @param out the pointer for the new index
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_new(git_index **out);
/**
* Free an existing index object.
*
* @param index an existing index object
*/
GIT_EXTERN(void) git_index_free(git_index *index);
/**
* Get the repository this index relates to
*
* @param index The index
* @return A pointer to the repository
*/
GIT_EXTERN(git_repository *) git_index_owner(const git_index *index);
/**
* Read index capabilities flags.
*
* @param index An existing index object
* @return A combination of GIT_INDEXCAP values
*/
GIT_EXTERN(unsigned int) git_index_caps(const git_index *index);
/**
* Set index capabilities flags.
*
* If you pass `GIT_INDEXCAP_FROM_OWNER` for the caps, then the
* capabilities will be read from the config of the owner object,
* looking at `core.ignorecase`, `core.filemode`, `core.symlinks`.
*
* @param index An existing index object
* @param caps A combination of GIT_INDEXCAP values
* @return 0 on success, -1 on failure
*/
GIT_EXTERN(int) git_index_set_caps(git_index *index, unsigned int caps);
/**
* Update the contents of an existing index object in memory
* by reading from the hard disk.
*
* If the file doesn't exist on the filesystem, the index
* will be cleared from its current content.
*
* @param index an existing index object
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_read(git_index *index);
/**
* Write an existing index object from memory back to disk
* using an atomic file lock.
*
* @param index an existing index object
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_write(git_index *index);
/**
* Get the full path to the index file on disk.
*
* @param index an existing index object
* @return path to index file or NULL for in-memory index
*/
GIT_EXTERN(const char *) git_index_path(git_index *index);
/**
* Read a tree into the index file with stats
*
* The current index contents will be replaced by the specified tree.
*
* @param index an existing index object
* @param tree tree to read
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_read_tree(git_index *index, const git_tree *tree);
/**
* Write the index as a tree
*
* This method will scan the index and write a representation
* of its current state back to disk; it recursively creates
* tree objects for each of the subtrees stored in the index,
* but only returns the OID of the root tree. This is the OID
* that can be used e.g. to create a commit.
*
* The index instance cannot be bare, and needs to be associated
* to an existing repository.
*
* The index must not contain any file in conflict.
*
* @param out Pointer where to store the OID of the written tree
* @param index Index to write
* @return 0 on success, GIT_EUNMERGED when the index is not clean
* or an error code
*/
GIT_EXTERN(int) git_index_write_tree(git_oid *out, git_index *index);
/**
* Write the index as a tree to the given repository
*
* This method will do the same as `git_index_write_tree`, but
* letting the user choose the repository where the tree will
* be written.
*
* The index must not contain any file in conflict.
*
* @param out Pointer where to store OID of the the written tree
* @param index Index to write
* @param repo Repository where to write the tree
* @return 0 on success, GIT_EUNMERGED when the index is not clean
* or an error code
*/
GIT_EXTERN(int) git_index_write_tree_to(git_oid *out, git_index *index, git_repository *repo);
/**@}*/
/** @name Raw Index Entry Functions
*
* These functions work on index entries, and allow for raw manipulation
* of the entries.
*/
/**@{*/
/* Index entry manipulation */
/**
* Get the count of entries currently in the index
*
* @param index an existing index object
* @return integer of count of current entries
*/
GIT_EXTERN(size_t) git_index_entrycount(const git_index *index);
/**
* Clear the contents (all the entries) of an index object.
* This clears the index object in memory; changes must be manually
* written to disk for them to take effect.
*
* @param index an existing index object
*/
GIT_EXTERN(void) git_index_clear(git_index *index);
/**
* Get a pointer to one of the entries in the index
*
* The entry is not modifiable and should not be freed. Because the
* `git_index_entry` struct is a publicly defined struct, you should
* be able to make your own permanent copy of the data if necessary.
*
* @param index an existing index object
* @param n the position of the entry
* @return a pointer to the entry; NULL if out of bounds
*/
GIT_EXTERN(const git_index_entry *) git_index_get_byindex(
git_index *index, size_t n);
/**
* Get a pointer to one of the entries in the index
*
* The entry is not modifiable and should not be freed. Because the
* `git_index_entry` struct is a publicly defined struct, you should
* be able to make your own permanent copy of the data if necessary.
*
* @param index an existing index object
* @param path path to search
* @param stage stage to search
* @return a pointer to the entry; NULL if it was not found
*/
GIT_EXTERN(const git_index_entry *) git_index_get_bypath(
git_index *index, const char *path, int stage);
/**
* Remove an entry from the index
*
* @param index an existing index object
* @param path path to search
* @param stage stage to search
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_remove(git_index *index, const char *path, int stage);
/**
* Remove all entries from the index under a given directory
*
* @param index an existing index object
* @param dir container directory path
* @param stage stage to search
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_remove_directory(
git_index *index, const char *dir, int stage);
/**
* Add or update an index entry from an in-memory struct
*
* If a previous index entry exists that has the same path and stage
* as the given 'source_entry', it will be replaced. Otherwise, the
* 'source_entry' will be added.
*
* A full copy (including the 'path' string) of the given
* 'source_entry' will be inserted on the index.
*
* @param index an existing index object
* @param source_entry new entry object
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_add(git_index *index, const git_index_entry *source_entry);
/**
* Return the stage number from a git index entry
*
* This entry is calculated from the entry's flag attribute like this:
*
* (entry->flags & GIT_IDXENTRY_STAGEMASK) >> GIT_IDXENTRY_STAGESHIFT
*
* @param entry The entry
* @returns the stage number
*/
GIT_EXTERN(int) git_index_entry_stage(const git_index_entry *entry);
/**@}*/
/** @name Workdir Index Entry Functions
*
* These functions work on index entries specifically in the working
* directory (ie, stage 0).
*/
/**@{*/
/**
* Add or update an index entry from a file on disk
*
* The file `path` must be relative to the repository's
* working folder and must be readable.
*
* This method will fail in bare index instances.
*
* This forces the file to be added to the index, not looking
* at gitignore rules. Those rules can be evaluated through
* the git_status APIs (in status.h) before calling this.
*
* If this file currently is the result of a merge conflict, this
* file will no longer be marked as conflicting. The data about
* the conflict will be moved to the "resolve undo" (REUC) section.
*
* @param index an existing index object
* @param path filename to add
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_add_bypath(git_index *index, const char *path);
/**
* Remove an index entry corresponding to a file on disk
*
* The file `path` must be relative to the repository's
* working folder. It may exist.
*
* If this file currently is the result of a merge conflict, this
* file will no longer be marked as conflicting. The data about
* the conflict will be moved to the "resolve undo" (REUC) section.
*
* @param index an existing index object
* @param path filename to remove
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_remove_bypath(git_index *index, const char *path);
/**
* Add or update index entries matching files in the working directory.
*
* This method will fail in bare index instances.
*
* The `pathspec` is a list of file names or shell glob patterns that will
* matched against files in the repository's working directory. Each file
* that matches will be added to the index (either updating an existing
* entry or adding a new entry). You can disable glob expansion and force
* exact matching with the `GIT_INDEX_ADD_DISABLE_PATHSPEC_MATCH` flag.
*
* Files that are ignored will be skipped (unlike `git_index_add_bypath`).
* If a file is already tracked in the index, then it *will* be updated
* even if it is ignored. Pass the `GIT_INDEX_ADD_FORCE` flag to
* skip the checking of ignore rules.
*
* To emulate `git add -A` and generate an error if the pathspec contains
* the exact path of an ignored file (when not using FORCE), add the
* `GIT_INDEX_ADD_CHECK_PATHSPEC` flag. This checks that each entry
* in the `pathspec` that is an exact match to a filename on disk is
* either not ignored or already in the index. If this check fails, the
* function will return GIT_EINVALIDSPEC.
*
* To emulate `git add -A` with the "dry-run" option, just use a callback
* function that always returns a positive value. See below for details.
*
* If any files are currently the result of a merge conflict, those files
* will no longer be marked as conflicting. The data about the conflicts
* will be moved to the "resolve undo" (REUC) section.
*
* If you provide a callback function, it will be invoked on each matching
* item in the working directory immediately *before* it is added to /
* updated in the index. Returning zero will add the item to the index,
* greater than zero will skip the item, and less than zero will abort the
* scan and cause GIT_EUSER to be returned.
*
* @param index an existing index object
* @param pathspec array of path patterns
* @param flags combination of git_index_add_option_t flags
* @param callback notification callback for each added/updated path (also
* gets index of matching pathspec entry); can be NULL;
* return 0 to add, >0 to skip, <0 to abort scan.
* @param payload payload passed through to callback function
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_add_all(
git_index *index,
const git_strarray *pathspec,
unsigned int flags,
git_index_matched_path_cb callback,
void *payload);
/**
* Remove all matching index entries.
*
* If you provide a callback function, it will be invoked on each matching
* item in the index immediately *before* it is removed. Return 0 to
* remove the item, > 0 to skip the item, and < 0 to abort the scan.
*
* @param index An existing index object
* @param pathspec array of path patterns
* @param callback notification callback for each removed path (also
* gets index of matching pathspec entry); can be NULL;
* return 0 to add, >0 to skip, <0 to abort scan.
* @param payload payload passed through to callback function
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_remove_all(
git_index *index,
const git_strarray *pathspec,
git_index_matched_path_cb callback,
void *payload);
/**
* Update all index entries to match the working directory
*
* This method will fail in bare index instances.
*
* This scans the existing index entries and synchronizes them with the
* working directory, deleting them if the corresponding working directory
* file no longer exists otherwise updating the information (including
* adding the latest version of file to the ODB if needed).
*
* If you provide a callback function, it will be invoked on each matching
* item in the index immediately *before* it is updated (either refreshed
* or removed depending on working directory state). Return 0 to proceed
* with updating the item, > 0 to skip the item, and < 0 to abort the scan.
*
* @param index An existing index object
* @param pathspec array of path patterns
* @param callback notification callback for each updated path (also
* gets index of matching pathspec entry); can be NULL;
* return 0 to add, >0 to skip, <0 to abort scan.
* @param payload payload passed through to callback function
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_update_all(
git_index *index,
const git_strarray *pathspec,
git_index_matched_path_cb callback,
void *payload);
/**
* Find the first position of any entries which point to given
* path in the Git index.
*
* @param at_pos the address to which the position of the index entry is written (optional)
* @param index an existing index object
* @param path path to search
* @return a zero-based position in the index if found;
* GIT_ENOTFOUND otherwise
*/
GIT_EXTERN(int) git_index_find(size_t *at_pos, git_index *index, const char *path);
/**@}*/
/** @name Conflict Index Entry Functions
*
* These functions work on conflict index entries specifically (ie, stages 1-3)
*/
/**@{*/
/**
* Add or update index entries to represent a conflict
*
* The entries are the entries from the tree included in the merge. Any
* entry may be null to indicate that that file was not present in the
* trees during the merge. For example, ancestor_entry may be NULL to
* indicate that a file was added in both branches and must be resolved.
*
* @param index an existing index object
* @param ancestor_entry the entry data for the ancestor of the conflict
* @param our_entry the entry data for our side of the merge conflict
* @param their_entry the entry data for their side of the merge conflict
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_conflict_add(
git_index *index,
const git_index_entry *ancestor_entry,
const git_index_entry *our_entry,
const git_index_entry *their_entry);
/**
* Get the index entries that represent a conflict of a single file.
*
* The entries are not modifiable and should not be freed. Because the
* `git_index_entry` struct is a publicly defined struct, you should
* be able to make your own permanent copy of the data if necessary.
*
* @param ancestor_out Pointer to store the ancestor entry
* @param our_out Pointer to store the our entry
* @param their_out Pointer to store the their entry
* @param index an existing index object
* @param path path to search
*/
GIT_EXTERN(int) git_index_conflict_get(
const git_index_entry **ancestor_out,
const git_index_entry **our_out,
const git_index_entry **their_out,
git_index *index,
const char *path);
/**
* Removes the index entries that represent a conflict of a single file.
*
* @param index an existing index object
* @param path to search
*/
GIT_EXTERN(int) git_index_conflict_remove(git_index *index, const char *path);
/**
* Remove all conflicts in the index (entries with a stage greater than 0.)
*
* @param index an existing index object
*/
GIT_EXTERN(void) git_index_conflict_cleanup(git_index *index);
/**
* Determine if the index contains entries representing file conflicts.
*
* @return 1 if at least one conflict is found, 0 otherwise.
*/
GIT_EXTERN(int) git_index_has_conflicts(const git_index *index);
/**
* Create an iterator for the conflicts in the index. You may not modify the
* index while iterating, the results are undefined.
*
* @return 0 or an error code
*/
GIT_EXTERN(int) git_index_conflict_iterator_new(
git_index_conflict_iterator **iterator_out,
git_index *index);
/**
* Returns the current conflict (ancestor, ours and theirs entry) and
* advance the iterator internally to the next value.
*
* @param ancestor_out Pointer to store the ancestor side of the conflict
* @param our_out Pointer to store our side of the conflict
* @param their_out Pointer to store their side of the conflict
* @return 0 (no error), GIT_ITEROVER (iteration is done) or an error code
* (negative value)
*/
GIT_EXTERN(int) git_index_conflict_next(
const git_index_entry **ancestor_out,
const git_index_entry **our_out,
const git_index_entry **their_out,
git_index_conflict_iterator *iterator);
/**
* Frees a `git_index_conflict_iterator`.
*
* @param iterator pointer to the iterator
*/
GIT_EXTERN(void) git_index_conflict_iterator_free(
git_index_conflict_iterator *iterator);
/**@}*/
/** @} */
GIT_END_DECL
#endif
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